Diamonds have long been a symbol of luxury and wealth. However, with the rise of lab-grown diamonds in recent years, it has become more important than ever to know how to identify fake lab diamonds. While lab-grown diamonds have the same chemical composition and physical properties as natural diamonds, there are a few foolproof signs that can help you determine whether a diamond is real or fake. In this article, we will reveal the secret to identifying fake lab diamonds, so you can make an informed decision before making a purchase.

1. Physical Properties Test

One of the easiest ways to identify a fake lab diamond is by conducting a physical properties test. Real diamonds are known for their exceptional hardness, so they should be able to scratch glass. Take a piece of glass and try to scratch it with the diamond. If the diamond leaves a scratch on the glass, it is likely to be real. However, if it doesn’t leave a scratch or leaves a white streak, it is likely to be a fake lab diamond.

2. Refractivity Test

Another way to identify a fake lab diamond is by conducting a refractivity test. Real diamonds have a high refractive index, which means they have excellent light reflection and refraction properties. To conduct this test, place the diamond on a piece of printed text and observe it from the top. If you can read the text through the diamond, it is likely to be a fake lab diamond. Real diamonds will distort the text due to their high refractive index.

3. Thermal Conductivity Test

Thermal conductivity is another important characteristic of diamonds that can help you identify a fake lab diamond. Diamonds have the highest thermal conductivity of any known material. To conduct this test, hold the diamond between your thumb and index finger and breathe on it. If the fog disappears quickly, it is likely to be a real diamond. Fake lab diamonds, on the other hand, have lower thermal conductivity, so the fog will linger for a longer period of time.

4. Lab Certification

One of the most reliable ways to identify a fake lab diamond is by checking for a lab certification. Genuine lab diamonds are certified by reputable gemological laboratories, such as the Gemological Institute of America (GIA) or the International Gemological Institute (IGI). These certifications provide detailed information about the diamond’s characteristics, including its origin and whether it is natural or lab-grown. Always ask for a certification when purchasing a diamond to ensure its authenticity.

5. Seek Expert Advice

If you are still unsure about the authenticity of a lab diamond, it is always a good idea to seek expert advice. Certified gemologists and diamond experts have the knowledge and experience to identify fake lab diamonds. They can use advanced tools and techniques to examine the diamond and provide you with an accurate assessment. Don’t hesitate to consult an expert before making a significant investment in a diamond.

In conclusion, identifying fake lab diamonds can be a challenging task. However, by conducting physical properties tests, refractivity tests, thermal conductivity tests, checking for lab certifications, and seeking expert advice, you can increase your chances of accurately determining whether a diamond is real or fake. Remember to always be cautious and do thorough research before making a purchase. With the right knowledge and information, you can confidently differentiate between real and fake lab diamonds.